using DocumentCreationSystem.Models.AgentOps;
using ModelOps = DocumentCreationSystem.Models.AgentOps;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace DocumentCreationSystem.Services.AgentOps
{
    /// <summary>
    /// AgentOps监控服务实现
    /// </summary>
    public class AgentOpsMonitoringService : IAgentOpsMonitoringService
    {
        private readonly ILogger<AgentOpsMonitoringService> _logger;

        public AgentOpsMonitoringService(ILogger<AgentOpsMonitoringService> logger)
        {
            _logger = logger;
        }

        public async Task<MonitoringDashboard> GetDashboardDataAsync()
        {
            _logger.LogInformation("获取监控仪表板数据");
            
            var dashboard = new MonitoringDashboard
            {
                Overview = new OverviewStatistics
                {
                    TotalWorkflows = 18,
                    ActiveWorkflows = 3,
                    CompletedToday = 5,
                    FailedToday = 1,
                    AverageExecutionTime = 12.5,
                    SuccessRate = 0.92,
                    TotalUsers = 40,
                    ActiveUsers = 18
                },
                ActiveWorkflows = new List<ActiveWorkflowInfo>
                {
                    new ActiveWorkflowInfo
                    {
                        WorkflowId = "WF001",
                        Name = "示例工作流1",
                        Status = WorkflowStatus.Running,
                        Progress = 55,
                        StartTime = DateTime.Now.AddMinutes(-10),
                        EstimatedRemainingMinutes = 8,
                        CurrentStep = "step2"
                    }
                },
                Performance = new PerformanceMetrics
                {
                    CpuUsage = 45.2,
                    MemoryUsage = 67.8,
                    DiskUsage = 23.5,
                    NetworkThroughput = new NetworkThroughput { InboundMbps = 12.3, OutboundMbps = 8.7 },
                    ResponseTime = new ResponseTimeStats { Average = 250, Min = 50, Max = 1200, P95 = 800, P99 = 1100 },
                    ConcurrentConnections = 25,
                    QueueLength = 2
                },
                SystemStatus = new SystemStatus
                {
                    OverallHealth = HealthStatus.Healthy,
                    Services = new List<ServiceStatus>
                    {
                        new ServiceStatus { Name = "WorkflowEngine", Status = HealthStatus.Healthy, Message = "运行正常", LastChecked = DateTime.Now, ResponseTimeMs = 30 },
                        new ServiceStatus { Name = "DialogEnhancer", Status = HealthStatus.Healthy, Message = "运行正常", LastChecked = DateTime.Now, ResponseTimeMs = 25 },
                        new ServiceStatus { Name = "TemplateExecutor", Status = HealthStatus.Warning, Message = "负载较高", LastChecked = DateTime.Now, ResponseTimeMs = 60 }
                    },
                    Database = new DatabaseStatus
                    {
                        ConnectionStatus = HealthStatus.Healthy,
                        ConnectionPoolSize = 50,
                        ActiveConnections = 12,
                        QueryResponseTimeMs = 40,
                        DatabaseSizeMB = 2048
                    },
                    ExternalDependencies = new List<ExternalDependencyStatus>(),
                    SystemStartTime = DateTime.Now.AddHours(-24)
                },
                RecentActivities = new List<RecentActivity>
                {
                    new RecentActivity
                    {
                        Timestamp = DateTime.Now.AddMinutes(-2),
                        Type = ActivityType.WorkflowStarted,
                        Description = "工作流 WF001 已启动",
                        Severity = ActivitySeverity.Info
                    },
                    new RecentActivity
                    {
                        Timestamp = DateTime.Now.AddMinutes(-5),
                        Type = ActivityType.WorkflowCompleted,
                        Description = "工作流 WF002 已完成",
                        Severity = ActivitySeverity.Info
                    }
                },
                ActiveAlerts = new List<ActiveAlert>
                {
                    new ActiveAlert
                    {
                        Name = "高CPU使用率",
                        Level = AlertLevel.Warning,
                        Message = "CPU使用率超过80%",
                        TriggeredAt = DateTime.Now.AddMinutes(-30),
                        Source = "SystemMonitor",
                        IsAcknowledged = false
                    }
                },
                LastUpdated = DateTime.Now
            };

            await Task.CompletedTask;
            return dashboard;
        }

        public async Task<WorkflowPerformanceMetrics> GetWorkflowMetricsAsync(string workflowId, TimeRange timeRange)
        {
            _logger.LogInformation($"获取工作流性能指标: {workflowId}");
            
            var metrics = new WorkflowPerformanceMetrics
            {
                WorkflowId = workflowId,
                AverageExecutionTime = TimeSpan.FromMinutes(5),
                SuccessRate = 0.95,
                TotalExecutions = 10
            };

            await Task.CompletedTask;
            return metrics;
        }

        public async Task<SystemHealthStatus> GetSystemHealthAsync()
        {
            _logger.LogInformation("获取系统健康状态");
            
            var healthStatus = new SystemHealthStatus
            {
                OverallHealth = ModelOps.HealthStatus.Healthy,
                Components = new List<ComponentHealth>
                {
                    new ComponentHealth { ComponentName = "Database", Status = ModelOps.HealthStatus.Healthy, Message = "OK" },
                    new ComponentHealth { ComponentName = "FileSystem", Status = ModelOps.HealthStatus.Healthy, Message = "OK" },
                    new ComponentHealth { ComponentName = "Network", Status = ModelOps.HealthStatus.Warning, Message = "高延迟" },
                    new ComponentHealth { ComponentName = "Memory", Status = ModelOps.HealthStatus.Healthy, Message = "OK" }
                },
                LastChecked = DateTime.Now
            };

            await Task.CompletedTask;
            return healthStatus;
        }

        public async Task<ResourceUsageInfo> GetResourceUsageAsync()
        {
            _logger.LogInformation("获取资源使用信息");
            
            var resourceUsage = new ResourceUsageInfo
            {
                CpuUsagePercentage = 45.2,
                MemoryUsageBytes = 8L * 1024 * 1024 * 1024,
                DiskUsageBytes = 120L * 1024 * 1024 * 1024,
                NetworkConnections = 150
            };

            await Task.CompletedTask;
            return resourceUsage;
        }

        public async Task<ErrorStatistics> GetErrorStatisticsAsync(TimeRange timeRange)
        {
            _logger.LogInformation($"获取错误统计信息");
            
            var errorStats = new ErrorStatistics
            {
                TotalErrors = 15,
                CriticalErrors = 3,
                Warnings = 5,
                ErrorsByType = new Dictionary<string, int>
                {
                    { "ValidationError", 8 },
                    { "TimeoutError", 4 },
                    { "NetworkError", 2 },
                    { "SystemError", 1 }
                }
            };

            await Task.CompletedTask;
            return errorStats;
        }

        public async Task<UserActivityAnalysis> GetUserActivityAnalysisAsync(TimeRange timeRange)
        {
            _logger.LogInformation($"获取用户活动分析");
            
            var analysis = new UserActivityAnalysis
            {
                ActiveUsers = 18,
                TotalSessions = 45,
                AverageSessionDuration = TimeSpan.FromMinutes(15),
                ActionCounts = new Dictionary<string, int>
                {
                    { "WorkflowExecution", 120 },
                    { "DialogInteraction", 85 },
                    { "TemplateUsage", 60 }
                }
            };

            await Task.CompletedTask;
            return analysis;
        }

        public async Task<QualityTrendAnalysis> GetQualityTrendAsync(TimeRange timeRange)
        {
            _logger.LogInformation($"获取质量趋势分析");
            
            var trendAnalysis = new QualityTrendAnalysis
            {
                AverageQualityScore = 0.92,
                TrendDirection = "Improving",
                TrendData = new List<QualityDataPoint>
                {
                    new QualityDataPoint
                    {
                        Timestamp = DateTime.Now.AddDays(-1),
                        QualityScore = 0.90,
                        Category = "Overall"
                    }
                }
            };

            await Task.CompletedTask;
            return trendAnalysis;
        }

        public async Task<bool> CreateCustomMetricAsync(CustomMetricDefinition metric)
        {
            _logger.LogInformation($"创建自定义指标: {metric.Name}");
            await Task.CompletedTask;
            return true;
        }

        public async Task<bool> SetupAlertAsync(AlertConfiguration alert)
        {
            _logger.LogInformation($"设置警报: {alert.Name}");
            await Task.CompletedTask;
            return true;
        }

        public async Task<List<AlertHistory>> GetAlertHistoryAsync(TimeRange timeRange)
        {
            _logger.LogInformation($"获取警报历史");
            
            var alertHistory = new List<AlertHistory>
            {
                new AlertHistory
                {
                    AlertId = "alert001",
                    AlertName = "高CPU使用率",
                    Level = ModelOps.AlertLevel.Warning,
                    TriggeredAt = DateTime.Now.AddHours(-2),
                    ResolvedAt = DateTime.Now.AddHours(-1),
                    Message = "CPU使用率超过80%"
                }
            };

            await Task.CompletedTask;
            return alertHistory;
        }

        public async Task<MonitoringReport> GenerateReportAsync(ReportConfiguration reportConfig)
        {
            _logger.LogInformation($"生成监控报告: {reportConfig.ReportType}");
            
            var report = new MonitoringReport
            {
                ReportId = Guid.NewGuid().ToString(),
                Title = $"监控报告 - {reportConfig.ReportType}",
                GeneratedAt = DateTime.Now,
                Content = "系统运行正常，性能指标良好",
                Data = new Dictionary<string, object>
                {
                    { "ReportType", reportConfig.ReportType },
                    { "TimeRange", new { reportConfig.TimeRange.StartTime, reportConfig.TimeRange.EndTime } },
                    { "IncludedMetrics", reportConfig.IncludedMetrics }
                }
            };

            await Task.CompletedTask;
            return report;
        }

        public async Task<ExportResult> ExportDataAsync(DataExportConfiguration exportConfig)
        {
            _logger.LogInformation($"导出数据: {exportConfig.ExportType}");

            var exportResult = new ExportResult
            {
                ExportId = Guid.NewGuid().ToString(),
                FilePath = $"export_{DateTime.Now:yyyyMMdd_HHmmss}.csv",
                FileSizeBytes = 1024L * 50, // 50KB
                ExportedAt = DateTime.Now,
                Success = true
            };

            await Task.CompletedTask;
            return exportResult;
        }
    }
}
